/**
 * Created with IntelliJ IDEA.
 * Description:
 * user:likai
 * Date:2022-10-16
 * Time:11:13
 */
public class ListNode {
         int val;
         ListNode next;
         ListNode(int x) {
             val = x;
             next = null;
         }

    @Override
    public String toString() {
        return "ListNode{" +
                "val=" + val +
                ", next=" + next +
                '}';
    }
}
